6AN 內螺紋喇叭螺母（用於硬管）

The flare seat matched up perfectly with my hardline, no leaks on the first try. The hex portion gave my wrench a solid grip without rounding. Exactly what I needed for this fuel system build.

Barely had to muscle it onto the hardline, which is rare for a flare nut. The threads felt clean and consistent, so it seated without any cross-threading drama. Solid fitment for a 6AN setup.

Threaded onto my hardline tubing perfectly with no binding, the flare seat matched up cleanly on the first try. I've used other fittings before that were a pain to seat, but this one saved me a lot of frustration. Exactly what I needed for a leak-free connection.